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UCC256404: Generate a signal to efficiently drive the synchronous rectification MOSFET based on the LLC switching timing

Conor
Guru 12065 points
Part Number: UCC256404
Other Parts Discussed in Thread: UCC24624, UCD3138

Tool/software:

Hi,

I am looking for a product that can output a signal from an LLC converter to a synchronous rectification (SR) controller.

Can you recommend any products?

Thanks,

Conor

  • 0
    TI__Guru* 85646 points

    Hello,

    Your question has been received and is under review.

    Regards,

  • 0 in reply to Mike O'
    TI__Guru* 85646 points

    Hello,

    For analog controllers TI does not offer and LLC that drives the gates of the SR directly.  However, TI offers the UCC24624 gate driver that can be used on the secondary of the LLC to drive the SRs.  It controls the SRs based on the voltage across the SRs and and the current through them.  This device has been used with the UCC256404 to driver SRs.

    If you are interested in using the ucc24624 for your application the following link will bring you to the data sheet for this SR controller.  https://www.ti.com/lit/gpn/ucc24624

    The UCD3138 is a digital PWM controller with 8 programable IOs.  You could configure this with to control the SRs and the half bridge.  If you want to evaluate this approach using digital control and have questions, please repost in the e2e with UCD3138 in the thread title, so our digital control power supply experts can answer your questions. 

    Thank you for interest in Texas Instruments (TI) products.  If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

    Regards,